/* Copyright (C) 2004 - 2006  db4objects Inc.  http://www.db4o.com

This file is part of the db4o open source object database.

db4o is free software; you can redistribute it and/or modify it under
the terms of version 2 of the GNU General Public License as published
by the Free Software Foundation and as clarified by db4objects' GPL 
interpretation policy, available at
http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
Suite 350, San Mateo, CA 94403, USA.

db4o is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. */
using System;
using System.Collections;
using Db4objects.Db4o.Types;
using Db4objects.Db4o.Internal;

namespace Db4objects.Db4o
{
	internal abstract class P1Collection : P1Object, IDb4oCollection, IDb4oTypeImpl
	{
		[NonSerialized]
		internal int i_activationDepth = -1;

		[NonSerialized]
		internal bool i_deleteRemoved;

		internal P1Collection()
			: base()
		{
		}

		public void ActivationDepth(int depth)
		{
			i_activationDepth = depth;
		}

		public void DeleteRemoved(bool flag)
		{
			i_deleteRemoved = flag;
		}

		public IEnumerator GetEnumerator()
		{
			// This is a bit of a mess, because IDictionary has
			// two GetEnumerator signatures.
			return GetEnumerator1();
		}

		protected abstract IEnumerator GetEnumerator1();

		internal int ElementActivationDepth()
		{
			return i_activationDepth - 1;
		}
	}
}